Reversible winding arrangement



Nov. 5, 1968 F. PosPlslL ETAL 3,409,237

REVERS IBLE WINDI NG ARRANGEMENT Filed March 2l, 1967 2 Sheets-Sheet l 37 n 24 INVENToRs 42 3 5 BY mMsm-,

Nov. 5, 1968 F. PosPlslL ETAL 3,409,237

REVERSIBLE WINDING ARRANGEMENT F'lled March 2l. 1967 2 Sheets-Sheet 2 1NVENTOR BY m5,@ M

United States Patent O 3,409,237 REVERSIBLE WINDING ARRANGEMENT Frantisek Pospisil and Jiri Elias, Usli nad Orlic, Czechoslovakia, assignors to Vyzkumny Ustav Bavlnarsky, Usti nad Orlici, Czechoslovakia Filed Mar. 21, 1967, Ser. No. 624,952 Claims priority, application Czechoslovakia,

' Mar. 23, 1966, 1,923/ 66 Claims. (Cl. 242-18) ABSTRACT OF THE DISCLOSURE Yarn produced in a spinning chamber and transported by a pair of transporting rollers to a windup roller, is moved back into the spinning chamber for attachment to the spun yarn only by the reversed windup roller while the transporting rollers are moved apart'and do not transport the yarn in thereversed direction.

Background of the invention The present invention relates to a winding arrangement in which an elongated flexible element, such as a yarn spun and twisted in a rotating spinning chamber, is transported by a pair of rollers, one of which is a transporting roller and the other a pressure roller, toward a windup roller which forms a bobbin package.

It is known to reverse the transporting rollers and the windup roller when the yarn breaks so that the broken yarn is reintroduced into the spinning chamber and there attached to the newly spun yarn end, whereuponl fthe direction of rotation of the transporting roller and winding roller is again reversed, and the repaired yarn is transported out of the spinning chamber and wound up.

The reversal of the direction of rotation of both the transporting rollers and the windup roller causes great tensionin the yarn portion Ibetween the same since the transporting rollers have a far smaller mass than the windup roller and the wound up yarn package so that the transporting rollers already rapidly transport the yarn in the -reversed direction before the windup roller has started its turning movement. The operator of the machine must then manually repair the yarn breakage between -the transporting rollers and the windup roller which increases the cost of labor and reduces the useful time of operation of the machine.'

Summary of the invention It is one object of the invention to overcome the disadvantages of winding apparatus according to the prior art, and to provide an automatically reversible winding arrangement in which a yarn breakage of the reversed yarn is prevented.

Another object of the invention is to automatically reverse the windup roller of a newly spun yarn when the same breaks while rendering the transporting means of the yarn inoperative.

With these objects in view, the present invention relates to a reversible winding arrangement for a ilexible elongated element, such as a yarn, and the term yam will be used in the present application to define any flexible elongated element which can be wound up.

The yarn is supplied to the winding apparatus by supply means, such as a rotary spinning chamber in which fibers are combined to form a strand which is twisted.

One embodiment of the invention comprises a windup unit rotatable ina windup direction for winding up a yarn, and a transporting unit having an inoperative conydition and an operative condition for transporting the yarn from a supply means to the windup unit. Preferably, the transporting unit includes a transporting roller conice nected with a windup roller, and a pressure roller mounted on a support for movement between a position cooperating with a transporting roller and a spaced position in which the transporting unit is inoperative.

Feeler means sense the yarn supplied to the transporting unit and control reversible drive means for the windup roller so that the same is reversed when the yarn breaks.

Operating means include sensing means `for sensing the direction of rotation, and actuating means acting on the support of the pressure roller to move the same to the inoperative position spaced from the transporting roller when the direction of rotation is reversed. i

As a result, only the reversed windup roller moves the broken yarn toward the spinning chamber for attachment to the newly spun yarn end so that a yarn breakage Ibetween the transporting unit and the windup `unitis prevented. The Sensing means may be constructed asV a magnet having a winding and cooperating with the transporting roller or the winding roller to produce different voltages when the rollers are reversed. An electromagnetic actuating means is controlled by the reversed voltage to move the pressure roller to the inoperative position.

In another embodiment of the invention, a one-way clutch has one clutch part connected with a transporting roller or with the windup roller for rotation and another clutch part which rotates only during reverse rotation of the respective roller. A cam is driven through a friction coupling by this part `of the clutch to shift the pressure roller to the inoperative position spaced from the transporting roller.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawing.

Brief description of the drawing FIG. 1 is a schematic and partly diagrammatic view illustrating a reversible winding arrangement according to one embodiment of the invention;

FIG. 2 is a fragmentary elevation, partially in section, illustrating another embodiment of the invention; and

FIG. 3 is a fragmentary axial sectional view of the embodiment of FIG. 2.

Description of the preferred embodiments Referring first to FIG. l, a spinning apparatus 1 which includes a rotary spinning chamber produces a spun and twisted yarn 2. The spinning chamber is of the conventional rotary type to which fibers are supplied so that the fibers are deposited on an annular inner surface of the spinning chamber and twisted when drawn by the transporting unit 3, 4 out of the outlet of the spinning chamber.

The transporting unit includes a transporting roller 3 connected by a chain transmission to a windup roller 8 which forms a rotating bobbin package 9.

A reversible drive motor 17 is connected to the shaft of windup roller 8 and rotates the same so that transporting roller 3 is also rotated during the normal operation of the apparatus. Pressure roller 4 is rotatably mounted on a support lever 5 which is turnable about a stationary pivot on the frame of the machine, as schematically indicated. An electromagnetic actuating means 11 has an armature connected to support lever 5 by a pivot, while the main part of the electromagnetic actuator 11 including the winding is pivotally mounted on the frame of the machine, as schematically indicated. When electromagnetic actuator means 11 is energized, support lever is turned in clockwisev direction so that pressure roller 4 is moved to a position spaced from the driven transporting roller 3 so that the transporting unit 3, 4, is inoperative and cannot transport the yarn.

A sensing means 14 includes a magnet and a winding that is located in proximity of transporting roller 3 so that during rotation of the same, a voltage is produced which is supplied through a line 9 to an electric circuit means 13. When transporting roller 3 rotates in clockwise direction for transporting yarn to the winding roller 8, the voltage produced by the electromagnetic sensing means 14 has a certain polarity to which the circuit 13 responds to de-energize electromagnetic actuating means 11, so that a spring, not shown, biases support lever 5 to the operative position in which pressure roller 4 cooperates with the rotating transporting roller 3 to transport the yarn toward the windup roller 8. Circuit 13 may include a relay opening a switch in line 12 when receiving the voltage produced by electromagnetic sensing means 14.

The portion of yarn 2 located between the spinning machine 1 and the transporting unit 3, 4, is sensed by feeler means 15 which responds to a yarn breakage with an impulse supplied to control means 16 which cause reversal of the direction of rotation of drive motor 17. Sensing means 15 may include a switch closed upon a yarn breakage and completing the circuit of a relayl in control means 16 shifting a reversing switch in control means 16 by which motor 17 is reversed.

When motor 17 starts to rotate in the reversed direction, the direction of rotation of windup roller 8 is reversed, and since transporting roller 3 is connected with windup roller 8 by the chain transmission 7, the direction of rotation of the transporting roller 3 is also reversed.

If pressure roller 4 would remain in its operative position, another yarn breakage may occur due to the'different masses and inertias of transporting roller 3 and windup roller 8.

As soon as transporting roller 3 starts to rotate in the opposite direction, the voltage produced by the electromagnetic sensing means 14 is reversed, causing the relay in circuit means 13 to close a switch and to energize electromagnetic actuating means 11 which moves support lever 5 in clockwise direction so that pressure roller 4 assumes a position spaced from transporting roller 3 in which the transporting unit is inoperative. Consequently, the yarn is moved in the reverse direction only by the reversed windup roller, and the broken yarn end is pushedback into the spinning chamber where it is automatically attached to the newly formed and spun yarn end. When feeler means 15 senses a continuous yarn portion between the spinning chamber and the transporting unit, control means 16 again reverse drive motor 17 to its normal direction of rotation so that windup roller 8 and transporting roller 3 are reversed and start to rotate in the normal clockwise transporting and winding direction.

The electromagnetic sensing means 14 responds to produce a voltage having the normal polarity so that the relay of circuit means 13 opens the switch in the line 12 and electromagnetic actuating means 11 is deenergized so that the spring of support lever 5 turns the same until pressure roller 4 again cooperates with transporting roller 3 and is driven by the same. The transporting unit is 4again operative, and the yarn is transported from the spinning chamber to the windup roller and wound up.

Referring now to the embodiment of FIGS. 2 and 3, a transporting roller 3' cooperates with a pressure roller 4' mounted on a support 20 which is pivotally supported on a pivot 6 on the frame of the machine. Transporting roller 3' is connected by a chainvdrive 7 with a windup roller 8 which winds a bobbin package 9, and is driven by a motor 17 which can be reversed by control means 16 including feeler means 15 for a yarn 2 supplied by a spinning machine 1, as described with reference to FIG. 1, and these parts of the apparatus which are common to both embodiments are not illustrated. The embodiment of FIGS. 2 and 3 dilfers from the embodiment of FIG. l by the construction of the operating means by which pressure roller 4 or 4', respectively, is moved to an inoperative position when the direction of rotation of the windup roller 8 and of transporting roller 3, or 3', respectively, is reversed due to a yarn breakage sensed by feeler means 15.

FIGS. 2 and 3 show mechanical operating means for this purpose, as compared with the electric operating means 11, 13, 14 of the embodiment of FIG. 1.

A shaft 18 carries the hollow transporting roller 3' which is connected to shaft 18 by a key 19. Shaft 18 carries a chain wheel for the chain drive 7, not shown in FIG. 3, as described with reference to FIG. l. The periphery of transporting roller 3' cooperates with the periphery of pressure roller 4' to transport the yarn in the windup direction during rotation of transporting roller 3' in clockwise direction. Transporting roller 3 has an inner cavity 21 between an outer cylindrical wall and an inner hub wall 22 which has a plurality of circumferentially spaced wedge shaped recesses 23 cooperating with small rolls 24 which are surrounded by an annular member 25. Members 22, 24, 25 constitute a one-way clutch which is disengaged during rotation of transporting roller 3' in counterclockwise direction. When transporting roller 3' is reversed upon the yarn breakage by control means 15, 16, 17, rolls 24 are clamped in the wedge-shaped recesses 23 between members 22 and 25, and clutch part 22 which is connected with transporting roller 3', rotates the other annular clutch part 25 which has radial projections 26 separated by recesses 27.

A friction coupling includes a rst coupling member 30 having a cylindrical flange 28 slidably mounted on clutch part 25 and having axial projections 29 located in the recesses 27 between radial projections 26 of annular clutch part 25. A coil spring 31 surrounds the cylindrical ange 28 and abuts projections 26 and a shoulder of coupling part 30. A ring-shaped friction lining 32 is secured to coupling part 30 and in sliding engagement with a corresponding circular surface of another coupling part 33 which has a cut-out 39 in which a stop pin 42 secured to a stationary frame wall 38 is located. Coupling member 33 also has a projecting cam lug 44 cooperating with a projecting part 43 of support lever 20. In the normal position of coupling part 33, a planar face on projection 43 engages a corresponding planar face on coupling part 33.

A torsion spring 36 is located in an annular recess 34 on the front face of coupling part 33, and has one end located in a bore 35 of coupling part 33, and the other end located in a blind bore 37 in the stationary frame Wall 38. Torsion spring 36 is tensioned, and biases coupllng part 33 with cam 44 to turn in counterclockwise dlrection, as viewed in FIG. 2, to the illustrated position in which the shoulder 40 of recess 39 in coupling part 33 abuts the stationary stop pin 42 which is secured to frame Wall 38. This position is maintained during the clockwise rotation of transporting roller 3' during which the yarn is transported to the windup unit 8, 9.

In the embodiment of FIGS. 2 and 3, the spinning unit 1 is assumed to be located above the transporting rollers 3', 4', and the winding roller 8 is assumed to be located below the transporting unit, as viewed in FIG. 2. During a winding operation, transporting roller 3' rotates in counterclockwise direction and transports together with pressure roller 4 the yarn toward the windup roller. When sensing means 15 senses a yarn breakage, control means 16 reverses drive motor 17 so that the direction of rotation of windup roller 8 and of transporting roller 3 is reversed so that transporting roller 3' rotates in clockwise direction. While during the winding operation, the one-way clutch 22, 24, 25 was disengaged, clutch portion 22 rotating in clockwise directionwedges rollers 24 in the narrow portions of the wedge-shaped spaces formed by recesses 23 and annular clutch part 25 so that clutch part 25 is also rotated in clockwise direction. The coupling fingers 26, 29 transmit the clockwise lrotation of clutch part 25 to coupling member 30 which by lining 32 frictionally engages coupling member 33 and turns the same in clockwise direction until shoulder 41 abuts stop pin 42 whereupon coupling member 33 cannot further turn in clockwise direction and lining 32 slides on coupling member 33 during further rotation of transporting roller 3' in clockwise direction. l

The angular displacement of coupling member 33 moves cam lobe 44 under the projection 43 so that support lever 20 is turned about pivot 6 in counterclockwise direction and pressure roller 4' is moved to a position spaced from transporting roller 3. The reversed windup roller 8 drives the broken yarn back into the spinning chamber while the transporting unit 3', 4 is in an inoperative condition. When the broken yarn is -again attached to the newly spun yarn end in the spinning chamber, sensing means is actuated by the yarn to cause by control means 16 the reversal of drive motor 17 so that windup roller 8 is again rotated in the Winding direction and transporting roller 3 again rotates in counterclockwise direction so that clutch part 22 also rotates in counterclockwise direction which cause the release of the oneway clutch since rolls 24 move to the deeper parts of recesses 23. Consequently, coupling member 30 is no longer driven by clutch part Z5.

The force of torsion spring 36 is now sufficient to turn coupling member 33 with cam lobe 44 back in counterclockwise direction until shoulder 40 again abuts stop 42 and cam lobe 44 releases projection 43 so that support lever is returned by its spring to the operative position in which pressure roller 4 cooperates with transporting roller 3 to transport the yarn.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of reversible winding arrangements differing from the types described above.

While the invention has been illustrated and described as embodied in a reversible winding apparatus in which a transporting unit is rendered inoperative when the transported yarn breaks while the windup unit is reversed, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should 'and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims.

We claim:

1. Reversible winding arrangement, comprising, in combination, supply means for supplying a yarn; a windup unit rotatable in a windup direction for winding up a yarn; a transporting unit having an inoperative condition, and an operative condition for transporting the yarn from said supply means to said windup unit; control means including feeler means for sensing the yarn supplied to said transporting unit, and controlling said windupfunit for reversing the direction of rotation of the same upon a yarn breakage; and operating means having a normal position for holding said transporting unit in said operative condition, and being responsive to a reversal of the direction of rotation to place said transporting unit in said inoperative condition so that only the reversed windup unit moves the brokenyarn toward said supply means for attachment to a yarn end 'whereby a yarn breakage between said transporting unit and said windup unit is prevented.

2. Reversible winding arrangement as claimed in claim 1, including transmission means for connecting said windup unit with said transporting unit for rotation; and wherein said control means include reversible drive means driving one of said units and thereby the other unit, and means for reversing the direction of rotation of said reversible `drive means when said feeler means senses a yarn breakage.

3. Reversible winding arrangement as claimed in claim 1, wherein said transporting unit includes a transporting roller connected with said windup unit for rotation, and a pressure roller having a first position cooperating with said transporting roller for transporting the yarn in said operative condition of said transporting unit, and a secong position spaced from said transporting roller in said inoperative condition of said transporting unit; and wherein said operating means move said pressure roller between said first and second positions.

4. Reversi-ble winding arrangement as claimed in claim 1, wherein said transporting unit includes a transporting roller connected with said windup unit for rotation, and a pressure roller havng a first position cooperating 'with said transporting roller for transporting the yarn in said operative condition of said transporting unit, and a second position spaced from said transporting roller in said inoperative condition of said transporting unit; and wherein said operating means include sensing means for sensing the direction of rotation of said transporting roller, and actuating means controlled by said sensing means upon reversion of the direction of rotation of said transporting roller to move said pressure roller to said second position so that said transporting roller does not transport the yarn in the reversed direction.

5. Reversible winding arrangement as claimed in claim 4, wherein said sensing means includes a magnet and a winding for producing different output signals when said said actuating means includes an electromagnet energized by said signals, and a movable support for said pressure roller operated by said electromagnet to move said pressure roller between said first and second positions.

6. Reversible winding arrangement as claimed in claim 4, wherein said sensing means includes a magnet and a Winding for producing different output signals when said transporting roller rotates in opposite directions, wherein said actuating means includes an electromagnet energized by said signals, and a movable support for said pressure roller operated by said electromagnet to move said pressure roller between said first and second positions; and wherein said control means include a reversible drive motor for driving said windup unit and thereby said transporting roller, and means for reversing the direction of rotation of said drive motor when said feeler means senses a yarn breakage.

7. Reversible winding arrangement as claimed is claim 4, wherein said sensing means includes a one-Way clutch having one clutch part connected with said transporting roller for rotation and another clutch part rotating only during reverse rotation of said transporting roller, and wherein said actuating means includes cam means operated by said other clutch part during rotation of the same, and a support for said pressure roller operated by said cam means to move said pressure roller between said first and second positions.

8. Reversible winding arrangement as claimed in claim 7, wherein said actuating means include a friction coupling connecting said lother clutch part with said cam means, stop means limiting turning movement of said cam means -by said other rotating clutch part in a position in which said cam means acts on said support to hold said pressure roller spaced from said supporting roller, a spring urging said cam means to turn opposite to the direction of rotation of said other clutch part when said one-way clutch is disengaged so that said cam means releases said support whereby said pressure rollers returns tov a position cooperating with said transporting roller, said stop means limiting turning movement of said cam means under the action of said spring means.

9. A reversible winding arrangement as claimed in claim 8 wherein said cam means has a recess bounded by two circumferentially spaced shoulders, said stop means being stationary and located in said recess.

10. A reversible winding arrangement as claimed in 8 claim 4, wherein said windup unit includes a windup roller, and comprising transmission means for connecting said transporting roller -with said windup roller.

References Cited UNITED STATES PATENTS 1,080,522 12/1913 Boyd 57-84 1,845,565 2/1932 Simonson et al 57--84 X 2,421,555 6/1947 Fraser 57-84 3,354,626 11/1967 Cizek et al. 57-58.89 X 3,354,631 11/1967 Elias et al. 57-58.95

STANLEY N. GILREATH, Primary Examiner. 

